Ore-roasting furnace.



scribed hereinafter.

ported by the metallic frame or skeleton. A'

-each end of the vertical su ports 13 and 14' is pivotally secured a rabb e carrying meinber'15,`wh1ch member also serves to tie 13 and 14 together thus forming a com lete rabble supporting frame common to oth upper` and lower furnaces. The vertical supports 13 and 14 are preferably connected by a flexible or jointed connection, shown lin the present instance as two bars or links 16 and 17 connected by means of a spring 18. Suitable bearing wheels 19' are provided,

-which support the rabble frame upon the tracks. By this peculiar construction of the rabble carriages extremely desirable results are produced which will be more fully de- A cable 20 or other suitable funicular connection is provided, to which the rabble carriages are attached. One or more' pulleys or sheaves 21 are located at each end bight of the cable. A suitable power device is provided which may be represented by one of vthese pulleys, to effect the tra-vel of the rope' and its attached trucks and rabbles.

' I do not deem it necessary to describe at length the construction or arrangement of the heating fire boxes or flues of the furnace 'as these may be of the ordinaryforms and within the 'knowledge' of .mechanics skilled in the art and are not specifically involved `in thisinvention. Any' suitable means for closing the furnace exit and entrance may be employed and also means for feeding and dischargin the ore. Though have shown in Fig. 1 a continuous hearth furnace with round ends and parallel stretches, it is not essential to this invention to so construct it. Either the round ends -of'the hearth may be omitted, or'the parallel stretchesrna- 'e omitted, or one of the round'ends may e omitted as indicated vin Eigl'Qwith Fig-3. j AIn the form suggested in which the bric Work is omitted from both the circular ends, the furnace would. then be ,practically a nest of/fou'r longitudinally adjacent and practically independent furnaces.

It is owing tothe peculiar construction of vthe rabble carriages that this Fig, 1 or Fig. 2

form of furnace is possible or practical in that therabble carrying and supporting bars can .pass around a short curve without widening of the slot at the end curves. It also .permits of .a'thinner rabble supporting bar n account of the closeness of the tracks to "the rabblesand so allows the use of so narrow a slot as to avoid the necessity,in most instances,. of anything in the form of slot closers. lThe swiveling of each vertical member 13 and 14 on its own vertical axis brings the wheel base of the truck to line contact, so that thetruck can practically turn on any radius, no matter how small.

Though the construction herein, has been described and shown as representing super-v imposed hearth furnaces, where the hearths are not superimposed.

By the construction hereinbefore described, it will be seen that the rabble carrying mechanism is at all times open and accessible toinspection and repair` The arrange-A i ment of the two portions of the multiple furnace as shown, bring about very desirable features of economy, Iin that the travel of the rabbles during the-return half of their journey is utilized.' The capacity of the furnace is thus morethan doubled without any addition to the moving parts of the construction, at least so far as concerns the rabbling of the ore, and where` the furnaces are superimposed asshownvin Fig. '6, the capacity is quadrupled. The multiple arrangement also permits thedischarge of ore' from the furnace at practically the samepoint at which it en(- tered. lt also permits in the same structure and with the same rabbling mechanism of different temperatures being maintained in the furnace or other different and indepelidelnttreatment of ore on,l the rabbling ocrs without interruption of a continuous process. Also by the arrangement and constructionl heretofore described, the slot and rails being in the same metallic structure and.

practicallyindependent of the brick Work, they are maintained in correct relative alinement, thus avoiding a serious practical difficulty and increasing the effective life yof the carriage or trucks and the rabbling mechanism generally. l

It thus is seen that av furnace constructed as shown in Fig. 1 would occupy the least possible ground room for the amount of hearth surface and bythe construction of the rabble mechanism, but one rope and ower connection is necessary to effect the ra bling of both hearths or of four hearths if the furnace is constructed. with the hearths separate.

This form of furnace also permits of other useful modifications in which the ends may serve as cooling hearths and in fact, many changes and modifications maybe made t( adapt the furnace to the varying conditions of yuse without departing from the essential nature of the invention.

What l'claim iszj 1. An ore roasting furnace having a hearth formed in two substantially parallel stretches the adjacent edges of which are structurally unseparated, a slot in each of the stretches 1t 1s apphcable j intermediate of the sides thereof theslot beingl joined by a ,curved slot continuation, rabbling devices in the furnace and means projecting through the slots to effect theirl travel.

isc'

Aeach of vthe stretches intermediate of the sides thereof the slots being joined by a curved slot continuationat the end, rabbling devices in the furnace and means passing through the slot to eect their travel, tracks for-the rabbling devices and a metallic skeleton, or frame arranged to form the support and attachment for the rabbletrack and slots independent of the brick structure whereby the tracks and slots aremaintained in" alinement.

4. An ore roasting furnace of brick or the l like having a hearth formed in two'substantially parallel stretches the adjacent edges of which are .structurally unscparated, aslot in each of the stretches intermediate of the sides thereof the slots being joined at each end by a curved slot continuation, rabbling devices, in the furnace and means passing through 'the slotl to effect their travel, tracks for the rabbling devices and a metallic skelet0n or frame arranged to form the support and attachmentl fer-the rabble-track and slot independent of the brick structure whereby the track and slot are niaintainedin alinement` An'ore roasting furnace having a hearth formed' in two substantiallyparallel stretches the adjacent edges of which are structurally d' unseparated,a slot in each of the stretches intermediate of thesides thereof the slot being joined by a curved slot continuation, rabblingdevices in the furnace vwith means projecting through the slot and pivotedin the rabbling devices `to effect their travel. Y

.6: An ore roasting furnace having a hearth formed in two substantially parallel stretches the adjacent edges of which are structurally unseparated', a slotin each of the stretches' intermediate of the sides thereof the slots being oined by a curved slot continuation at each end, rabbling devices in the furnace and means projecting through the slots and piv oted in the rabbling devices to-effect their travel. y

7. in ore roasting furnace of brick or the like having a hearth formed in two substantially parallel stretches the adjacent edges of which are structurally unseparated, a slot4 in each of `the stretches intermediate lefthe sides thereof the slots being joined by a curved slotcontinuation at the end, rabbhng devices in the furnace and meanspassing through the slot and pivoted in the rabbling devices to effect their travel, tracks for the .rabbling devices and a metallic skeleton or frame arranged to form the support and attachment for the rabble track and slots independent of the brick structure whereby ,the tracks and slots are maintained in alinement` 8. in ore roasting furnace of brick or the like having a hearth formed in two substantially parallel stretches the accnt edges of which are structurally unseparated, a slot in each of the stretches intermediate of the sides thereof the slots being joined at each end by a curved slot continuation, :rabbling devices in the furnace and means passing through the slot and pivoted inthe rabbling devices to effect their travel, tracks for the rabbling rdevices and a metallic skeleton or frame arranged to form the support and attacliment for the rabble-track and slot independent of the brick structure whereby the and means projecting through the slots adapted to stir the ore in the furnace.

10. An ore roasting furnace having a hearth consisting of .rectilinear and curved port-ions in the same plane, a substantially similar furnace superimposed thereon and rabble carrying devices common to both furnaces.

ll. An orev roasting furnace having a hearth consisting of connected curved and parallel j )ortions7 a-substantially similar furnace superimposed thereon and rabble carryi ing devices common to both furnaces.

12.- An ore roasting furnace having a' hearth consisting cf parallel adjacent or contiguous stretches and a curved portion con necting the stretches at each end, a substantially similar furnace superimposed thereon and rabblecarrying devices common to both furnaces.

13. An ore roastinefuriiace having a portion of its hearth of U shape, a substantially lsimilar furnace superimposed thereon and rabble carrying devices common to both furnaces.

14. A. device consisting, of amultiplicity of side by side and'superiinp'osed ore roasting furnaces, rabbling devices in each of said, furnaces, an endless traveling funicular dei-,-

vice having parallel stretches which are lin the same horizontal plane suitably arranged to effect the travel o'f the rabbling devices in' all the furnaces, ,15. device consisting of an upper and lower furnace, rabbling devicesy withinv that furnaces, aI bar connecting and' supporting said rabbliiig devices and means attached thereto adapted to effect its travel.

' bling devices, a carriage resting upon tracks,

said carriage comprising members pivoted in the rabbling devices Within the furnace.

18. A device consisting of an upper. and lower furnace,'rabbling devices Within the furnaces, a bar pivotally connected to and supporting said rabbling devices and means attached thereto adapted to effect its travel.

19. In a mechanically rabbled ore roasting furnace, a rabble carriage consisting `of two vertically pivoted bars, a rabbling device Within the furnace in which said bars'are pivoted, Wheels upon said bars adapted to i support the rabbling device and tracks upon which the Wheels run.

20. In a mechanically rabbled ore roasting furnace, a rabble carriage'consisting of two vertically pivoted bars, a rabb'ling device Within the furnace in Whichv said bars are pivoted, Wheels upon said'bars adapted to support the rabbling device, tracks upon which the Wheels run and -a second furnace having a substantially similar rabbling device. in which the other ends of said bars are ivoted whereby the carriage formed by said bars are common to both rabbling devices and furnaces.

' 2l. A device consisting of a'multiplicity of ore roasting furnaces, one or more of which is superimposed, rabbling devices in each'of the furnaces traveling in the same direction and a single funicular device adapted to effect the travel of the rabbling` devices.

22. A device consisting of a multiplicity of ycurved hearth furnaces, rabbling devices traveling in said furnaces and a single funicular device adapted to effect the travelof the rabbling devices. i

23. A device consisting of a superimposed ore roasting furnace having a slotted roof` to the lower furnace and a slotted hearth to the upper furnace, rabbling devices traveling 1n said furnaces, a bar projecting through lsaid slots connecting and supporting said rabbling devices and means attached thereto to eect its travel.

24. A curved hearth ore roasting furnace,

rabbling devices pivotally connected in the other, rabblingdevices adapted to pass into V and through said furnaces, tracks -for the rabbling devices and a metallic skeleton or frame suitably arranged to form the support and attachment for the rabble tracks and slots independently of the brick structure whereby the tracks and slots are maintained in alinement. A

26. A device consisting of superimposed ore roasting furnaces constructed of brick o1' the like, having a slotted roof to the lower furnace and aV slotted hearth to the 'upper furnace, rabbling devices adapted to pass into and through said furnaces7 tracks for the rabbling devices and a metallic skeleton or vframe suitably arranged to form the support and attachment for the rabble tracks and slots independently of the brick structure wherebyv the tracks and slots are maintained in alinement.

27. In a mechanically rabbled ore roasting furnace having a slot, a rabble carriage consisting of tWo vertically pivoted bars, means adapted to aline the bars with eachother and.

the slot, a rabbling device Within the furnace in which said bars are pivoted, Wheels uponsaid bars adapted to support the rabbling device and tracks upon which the Wheels run.

WILLIAM H. SMYTH.

Witnesses: 1

Jnssn R. Eorr, `J. J; MGINERNEY. 

